Utah Code § 16-18-103: Governing law.

The internal affairs of a partnership and the liability of a partner as a partner for the debts, obligations, or other liabilities of the partnership are governed by:

(1) in the case of a limited liability partnership, the law of this state; and

(2) in the case of a partnership that is not a limited liability partnership, the law of the state of the jurisdiction in which the partnership has its principal office.